START VALVE - REMOVAL/INSTALLATION
1. General
A. This procedure has two tasks:
(1) Start Valve Removal
(2) Start Valve Installation.
TASK 80-11-03-000-801-F00
2. Start Valve Removal
(Figure 401)
A. General
(1) This task provides the instructions on how remove the start valve.
B. References
Reference Title
70-10-02-910-801-F00 General Precautions during the Removal and Installation of
Engine Components (P/B 201)
71-11-02-010-801-F00 Open the Fan Cowl Panels (P/B 201)
C. Location Zones
Zone Area
411 Engine 1 - Engine
421 Engine 2 - Engine
D. Prepare for the Removal
SUBTASK 80-11-03-860-013-F00
(1) For Engine 1, open this circuit breaker and install a safety tag:
CAPT Electrical System Panel, P18-2
Row Col Number Name
B 8 C01103 ENGINE 1 START VALVE
SUBTASK 80-11-03-860-014-F00
(2) For Engine 2, open this circuit breaker and install a safety tag:
F/O Electrical System Panel, P6-2
Row Col Number Name
C 4 C00154 ENGINE 2 START VALVE
SUBTASK 80-11-03-860-003-F00
(3) Make sure that the start lever is in the CUTOFF position and install a DO-NOT-OPERATE tag.
SUBTASK 80-11-03-860-004-F00
(4) Make sure that the engine start switch is off and install a DO-NOT-OPERATE tag.
ILF 301, 304, 308, 310, 314, 315, 317-319, 323, 331-399, 533, 535, 537, 562; AIRPLANES WITH
AUTO-IGNITION
(a) The AUTO position is off.
ILF ALL
SUBTASK 80-11-03-860-005-F00
(5) Make sure that the BLEED ISOLATION VALVE switch on the P5 Forward Overhead Panel is in
the CLOSE position:
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
CFM56 ENGINES (CFM56-7)
80-11-03
Page 401
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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